package com.prototype.deepclone;

import java.io.*;

public class DeepProtoType implements Serializable, Cloneable {

    public String name; //String 属性

    public DeepCloneableTarget deepCloneableTarget; //引用类型数据

    // 构造器
    public DeepProtoType() {
        super();
    }

    // 深拷贝 - 方式一使用clone方法
    @Override
    protected Object clone() throws CloneNotSupportedException {

        Object deep = null;

        //这里完成对基本数据类型（属性）和String的克隆
        deep = super.clone();

        //对引用类型的属性，进行单独处理
        DeepProtoType deepProtoType = (DeepProtoType) deep;

        //在DeepProtoType对象创建的时候，deepCloneableTarget就会被创建好，所以它就具有克隆的方法。
        deepProtoType.deepCloneableTarget = (DeepCloneableTarget) deepCloneableTarget.clone();
        return deepProtoType;
    }

    // 深拷贝 - 方式2 通过对象的序列化实现（推荐）
    public Object deepClone() {

        //创建流对象
        ByteArrayOutputStream bos = null;
        ObjectOutputStream oos = null;
        ByteArrayInputStream bis = null;
        ObjectInputStream ois = null;

        try {
            //序列化
            bos = new ByteArrayOutputStream();
            oos = new ObjectOutputStream(bos);
            oos.writeObject(this);

            //反序列化
            bis = new ByteArrayInputStream(bos.toByteArray());
            ois = new ObjectInputStream(bis);
            DeepProtoType copyObj = (DeepProtoType) ois.readObject();

            return copyObj;
        } catch (Exception e){
            // TODO: handle exception
            e.printStackTrace();
            return null;
        } finally {
            // 关闭流
            try {
                bos.close();
                oos.close();
                bis.close();
                ois.close();
            } catch (Exception e2) {
                // TODO: handle exception
                System.out.println(e2.getMessage());
            }
        }
    }
}
